Ummm, alright. So, to make money in Pintereset, firstly you need to find a niche to promote. Then, you have to find Pins related to your niche and spam your link. Now, these are some basics, you must think yourself on how to do it better. for example using bots and stuff. Same goes for instagram, find people who are interested to the product/niche that you want to promote and introduce them to your landing page. Again, this is how it can be done, now you should take what i told you and think of a better strategy yourself.

definitely yes, as for the Instagram. We've never tested Pinterest, but sucessfully monetize traffic from Instagram (sending to CPA offers). But of course, no one will share the direct strategies, this niche is too provitable to raise competitors I guess.